Distributing-valve.



No. 792,090. PATENTED JUNE 13, 1905. J. TRAPP.

DISTRIBUTING VALVE.

APPLICATION FILED AUG. 20,1902.

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No. 792,090. PATENTED JUNE 13, 1905. J. TRAPP. DISTRIBUTING VALVE.

APPLICATION FILED AUG. 20,1902.

3 SHEETS-SHEET 2.

Nb. 792,090. PATENTED JUNE 13, 1905.

J. TRAPP.

DISTRIBUTING VALVE.

APPLICATION FILED AUG. 20,1902;

3 S11EETS--BHBET 3.

WITNESSES:

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UNITED STATES Patented June 13, 1905.

PATENT Guinea.

DISTRIBUTING-VALVE.

SPECIFICATION forming part of Letters Patent No. 792,090, dated June 13, 1905.

Application filed August 20, 1902. Serial No. 120,413- v To all whom, it may concern.-

Be it known that I, Josnr TRAPP, civil engineer, a subject of the Emperor of Austria- Hungary, residing at Karolinenthal, near Prague, in the Empire of Austria-Hungary, have invented certain new and useful Improvements in Distributing-Valves, of which the following is a specification.

In the Rider distributing-valve the cylindrical expansion-slide or secondary valve is guided within the cylindrical ground slide or This arrangement is connected with the objectionable feature that the diameter of the cylindrical primary valve must be large, in consequence of which the valve becomes unduly heavy. The primary valve has, furthermore, ribs and hollow spaces, and the stufling-box for the spindle of the secondary valve is located in the spindle of the primary one.

In the present invention the cylindrical expansion-slide is arranged within a stationary casing located parallel to the ground slide or main valve in the valve-chest. It is actuated by an eccentric corresponding to the ideal relative eccentric of the Rider valve and the variation or change in the degree of filling or expansion is efi'ected by a rotary movement of said slide, this movement being brought about by an ordinary centrifugal governor.

In order to perfectly relieve the expansionslide from the steam-pressure, the casing is provided with at least four oblique slots, of which two are located opposite to each other in one-half of the casing and the other tWo, also opposite to each other, in the other half; but instead of four slots six, eight, or more such ones, always divided into two groups and arranged uniformly around the circumference of the casing, may be employed. The same number and kind of slots is also in the slide.

In the drawings, Figure 1 is a horizontal section through my improved distributingvalve. Fig. 2 is a representation of the developed inner surface or surfaces of the casing, which in this instance is bipartite. Fig. 3 is an elevation showing the means whereby the expansion-valve is rotated. Fig. 4 is a vertical longitudinal section through an arm or bracket extending from the side of the valve-chest and serving as a support for the mechanism by which a longitudinal and rotary reciprocating motion is transmitted to the expansion-valve.

The valve-chest a, Fig. 1, contains the circular slide (ground-valve, primary valve) Z) and the circular slide (expansion-valve, secondary valve) 0, which is located in a bipartite casing (Z, having in each part at least two oblique slots 0, Fig. 2. Similar slots (not to be seen) are in the slide 0, which is connected, by means of the rod f, with an eccentric of the kind above stated, the connection being such that the rod and the slide are not only displaced lengthwise, but may also be turned around their common longitudinal axis by a centrifugal governor. g is the rod of the valve 6. The means whereby this double reciprocating movement is given to the valve 0 is illustrated in Figs. 3 and 4. The valve-rod f is connected with a sleeve 0, supported by bearings 19 and p of a bracket 9, extending from the valve-chest a. The rod f extends through the sleeve 0 and forms at its end a ball f, which is suitably connected with a rod r of an ordinary eccentric r. The connection between the rod f and the sleeve 0 is effected by spline and groove in such a manner that the rod f may be moved longitudinally within the sleeve, but cannot be turned except together with or by the same. To the sleeve 0 is keyed an arm 8, which is connected by a rod twith the lever to of the centrifugal governor w. It will thus be seen that the governor causes the partial rotary movement of the sleeve 0 and with it the rod f, whereas the eccentric causes the longitudinal displacement of the rod, by Which the expansion-valve c is correspondingly moved.

The live steam passes from the steam-chambers h it through the slots of the slide 0 and the casing (Z, the connection being on either side alternately established and interrupted as the slide reciprocates. The wall a between the casing d and the slide 6 has apertures 70, through which the steam passes into annular spaces formed by contractions of said slide 7). As this slide rcciprocates the steam passes alternately into the channels Z Z, leading to the cylinder m Each channel Z is alternately connected with the respective annular space formed by the respective contracted part of the slide 6 and with the respective exhaust-chamber n. The two chambers 92' are connected with each other by the central hollow space of the slide 7), and the two chambers are connected with each other by the central hollow space of the slide 0, the spaces it and n being separated on either side by the wall Having now described my invention, what I desire to secure by a patent of the United States is 1. In a distributing-valve, the combination, with a valve-chest having two distinct chambers, a cylindrical main valve located in one of said chambers, and a communication between the two chambers, of a hollow ex pansion-valve located in the other chamber and provided with diagonal slots, means for admitting steam to the interior of the expansion-valve, and means for bringing the slots of the expansion-valve into and out of register with the communication between the two chambers.

2. In a distributing-valve, the combination, with a valve-chest having two separate chambers and a communication between the two chambers, of a cylindrical main valve located in one of said chambers and provided with annular steam-passages, a casing located in the other chamber and provided with peripheral slots, a hollow expansion-valve adapted for longitudinal and rotary movement within said. casing and provided with slots corresponding to those in the casing, a steam-passage leading to the interior of the expansion-valve, and means for actuating the two valves.

3. In a distributing-valve, the combination, with a valve-chest having two separate chambers and a communication between the two chambers, of a cylindrical main valve located in one of said chambers and provided-with annular steam-passages, a casing located in the other chamber and provided with at least four diagonal slots, a hollow expansion-valve adapted for longitudinal and rotary reciprocating movement within the said casing, said expansion-valve having slots corresponding in position and number to those in the casing, steampassages leading to the interior of the expansion-valve, an d means for actuating said valves.

4:. In a distributing-valve, the combination, with a valve-chest having two separate chambers and communication between said chambers, of a cylindrical main valve located in one of said chambers and provided with annular grooves serving as steam-channels, a cylindrical casing located in the other chamber and provided near each end and at regular distances around its periphery with diagonal slots, a hollow cylindrical expansionvalve located within the casing and provided with slots corresponding in position and number with those in the casing, a steam-passage leading to the interior of the expansion-valve, and means for actuating the two valves.

5. In a distributing-valve, the combination, with a valve-chest having two separate chambers, one connecting with the cylinder and the other with a steam-supply, and a passage communicating between the two chambers, of a cylindrical main valve located in one chamber and provided with annular grooves serving as steam-channels, a communication through the main valve with the exhaust, a cylindrical easing located in the other chamber and provided with a plurality of diagonal slots distributed equally near the two ends of the casing and around its periphery, a cylindrical expansionvalve located within the casing and provided with slots corresponding in number and position with those in the casing, a passage through the center of the expansion-valve communicating with the steam -supply and with the slots, means for connecting each of said valves with an eccentric, and means for imparting to the expansion-valve a reciprocating rotary movement under the influence of the governor.

6. In a distributing-valve, the combination, with a valve-chest having two distinct chambers, a passage communicating between the two chambers, one chamber communicating with the cylinder and the other chamber connecting with the steam-supply, a cylindrical main valve located in one chamber and provided with annular grooves serving as steamchannels, and a passage through said main valve connecting with the exhaust, of a cylindrical casing located within the other chamber and provided with at least four diagonal peripheral slots located near each end of said casing and upon the opposite sides of the same, an expansion-valve located within said casing and provided with slots corresponding in number and position with those in the casing, a passage through said expansion-valve communicating with the steam-supply and with the slots, a connection between both the main valve and the expansion-valve and an eccentric whereby the valves are longitudinally re ciprocated, and a connection between said expansion-valve and the governor whereby a variable reciprocating rotary movement is im parted to the expansion-valve.

In witness whereof I have hereunto set my hand in presence of two Witnesses.

JOSEF TRAPP.

Witnesses:

ARTHUR Sormonz, RICHARD Donne. 

